Chrysler Fifth Avenue high beam headlight bulbs use H4651 size while low beam headlight bulbs use H4656 or H4652 sizes. The replacement chart contains vehicle production years and bulb size specifications spanning 1983 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H4651 and H4656 are ANSI-standardized sealed beam units used across the US and Canadian markets. Both share a 4x6-inch rectangular form factor and operate at 12V, with the entire unit replaced rather than an internal filament or bulb element.
The Chrysler Fifth Avenue uses the H4651 sealed beam for the high beam position across all model years covered in the specifications, spanning 1983-1989 without variation.
The H4656 sealed beam fills the low beam position for the majority of model years listed, specifically 1983-1985 and 1987-1989.
The 1986 Fifth Avenue low beam position uses the H4652 rather than the H4656. The H4652 is a variant of the H4651 and shares the same 4x6-inch rectangular sealed beam construction and 12V rating.
Because the H4651, H4652, and H4656 are all sealed beam units, none of them accept replacement bulbs internally. A failed unit requires full assembly replacement.
Although the H4651 and H4656 share the same physical 4x6-inch rectangular housing format, they are designated for different beam functions and are not interchangeable between the high and low beam positions.
The H4652, used only in the 1986 low beam position, is described as a variant of the H4651. Despite this relationship, the H4651 occupies the high beam position in that same year, indicating the two serve distinct optical roles.